TOPEKA, Kan. (AP) – The head of the Kansas Rifle Association says gun rights supporters in Kansas are “all in” for a new state law that seeks to block federal regulation of some guns.

She’s reacting to the news that U.S. Attorney General Eric Holder has told Governor Sam Brownback the new law is unconstitutional and the federal government is willing to go to court over it.

Kansas NRA President Patricia Stoneking says gun rights supporters have been prepared for such a response from President Barack Obama’s administration. And she says “the people of Kansas are going to back this up.”

The Kansas law is modeled on a 2009 Montana law that is being reviewed by a federal appeals court, and Alaska lawmakers approved a similar measure last month. Alabama, Missouri and Oklahoma lawmakers are considering similar legislation.